ENellipse {EnQuireR}R Documentation

Confidence ellipses

Description

This function allows to draw ellipses around the categories of a chosen variable.

Usage

ENellipse(matP, cluster, resampling="population", iter=500, alpha = 0.05, coord = c(1, 2), eig, cex = 1, color = NULL)

Arguments

matP factorial coordinates from MCA
cluster chosen categorical variable
resampling If "population", the resampling is done within the whole dataset. If "cluster", it is done within the clusters
iter number of iterations for the Bootstrap method, by default iter=500
alpha the confidence level of the ellipses. By default alpha=0.05
coord selected axes
eig eigenvalues of the MCA
cex graphical option: character size
color graphical option: ellipses' colours

Details

This function can be used to draw ellipses around the centers of gravity of each cluster, when the chosen categorical variable is the variable obtained after the cluster analysis.

Author(s)

Jerome Bouche jerome.bouche@yahoo.fr
Marine Cadoret marine.cadoret@agrocampus-ouest.fr
Gwenaelle Fournier gwenaelle.fournier@gmail.com
Olivier Fournier olivier.fournier76@gmail.com
Francois Le Poder francois.lepoder@gmail.com

Examples

## Not run: 
data(tea)
res.enmca=ENMCA(tea[,1:18])
x<-res.enmca$MCA$ind$coord[,1:2]
b<-res.enmca$data[,ncol(res.enmca$data)]
ENellipse(matP=x, cluster=b, resampling="population", iter=500, alpha = 0.05, coord = c(1, 2), eig=res.enmca$MCA$eig, cex = 1, color = NULL)
## End(Not run)

[Package EnQuireR version 0.09 Index]